Samuel Huang | 06f1ae9 | 2018-03-13 18:19:34 +0000 | [diff] [blame] | 1 | // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef COMPONENTS_ZUCCHINI_REFERENCE_SET_H_ |
| 6 | #define COMPONENTS_ZUCCHINI_REFERENCE_SET_H_ |
| 7 | |
| 8 | #include <stddef.h> |
| 9 | |
| 10 | #include <vector> |
| 11 | |
| 12 | #include "components/zucchini/image_utils.h" |
| 13 | |
| 14 | namespace zucchini { |
| 15 | |
| 16 | class TargetPool; |
| 17 | |
Etienne Pierre-doray | 8f9a9e7 | 2018-08-13 18:49:00 +0000 | [diff] [blame] | 18 | // Container of distinct references of one type, along with traits, only used |
| 19 | // during patch generation. |
Samuel Huang | 06f1ae9 | 2018-03-13 18:19:34 +0000 | [diff] [blame] | 20 | class ReferenceSet { |
| 21 | public: |
Etienne Pierre-doray | 8f9a9e7 | 2018-08-13 18:49:00 +0000 | [diff] [blame] | 22 | using const_iterator = std::vector<Reference>::const_iterator; |
Samuel Huang | 06f1ae9 | 2018-03-13 18:19:34 +0000 | [diff] [blame] | 23 | |
| 24 | // |traits| specifies the reference represented. |target_pool| specifies |
| 25 | // common targets shared by all reference represented, and mediates target |
| 26 | // translation between offsets and indexes. |
| 27 | ReferenceSet(const ReferenceTypeTraits& traits, |
| 28 | const TargetPool& target_pool); |
| 29 | ReferenceSet(const ReferenceSet&) = delete; |
| 30 | ReferenceSet(ReferenceSet&&); |
| 31 | ~ReferenceSet(); |
| 32 | |
| 33 | // Either one of the initializers below should be called exactly once. These |
| 34 | // insert all references from |ref_reader/refs| into this class. The targets |
| 35 | // of these references must be in |target_pool_|. |
| 36 | void InitReferences(ReferenceReader&& ref_reader); |
| 37 | void InitReferences(const std::vector<Reference>& refs); |
| 38 | |
Etienne Pierre-doray | 8f9a9e7 | 2018-08-13 18:49:00 +0000 | [diff] [blame] | 39 | const std::vector<Reference>& references() const { return references_; } |
Samuel Huang | 06f1ae9 | 2018-03-13 18:19:34 +0000 | [diff] [blame] | 40 | const ReferenceTypeTraits& traits() const { return traits_; } |
| 41 | const TargetPool& target_pool() const { return target_pool_; } |
| 42 | TypeTag type_tag() const { return traits_.type_tag; } |
| 43 | PoolTag pool_tag() const { return traits_.pool_tag; } |
| 44 | offset_t width() const { return traits_.width; } |
| 45 | |
Etienne Pierre-doray | 8f9a9e7 | 2018-08-13 18:49:00 +0000 | [diff] [blame] | 46 | // Looks up the Reference by an |offset| that it spans. |offset| is assumed to |
| 47 | // be valid, i.e., |offset| must be spanned by some Reference in |
| 48 | // |references_|. |
| 49 | Reference at(offset_t offset) const; |
Samuel Huang | 06f1ae9 | 2018-03-13 18:19:34 +0000 | [diff] [blame] | 50 | |
| 51 | size_t size() const { return references_.size(); } |
| 52 | const_iterator begin() const { return references_.begin(); } |
| 53 | const_iterator end() const { return references_.end(); } |
| 54 | |
| 55 | private: |
| 56 | ReferenceTypeTraits traits_; |
| 57 | const TargetPool& target_pool_; |
Etienne Pierre-doray | 8f9a9e7 | 2018-08-13 18:49:00 +0000 | [diff] [blame] | 58 | // List of distinct Reference instances sorted by location. |
| 59 | std::vector<Reference> references_; |
Samuel Huang | 06f1ae9 | 2018-03-13 18:19:34 +0000 | [diff] [blame] | 60 | }; |
| 61 | |
| 62 | } // namespace zucchini |
| 63 | |
| 64 | #endif // COMPONENTS_ZUCCHINI_REFERENCE_SET_H_ |